The dots are the same color
Don't fool your eyes
The human optical system is remarkably adaptive. Your brain compensates colour toward a white balance. If there is a lot of blue in your field of view, your brain counterbalances this by adding the opposite colour. As a result, the dot in the purple area appears greyer than it actually is.
Imagine that dot is your expensive calibrated monitor. That's why those skin tones look so unhealthy in your renders.
Whether you work with film, video, photography, or graphic design: only when you perceive colour accurately will you deliver your best work. A neutral working environment takes your work to the next level.
Why noy
Mix it yourself?
You cannot simply have middle grey paint mixed at a DIY store. You may find a shade of grey that comes close, but getting that exact colour onto the wall is another matter entirely. Mixing methods are not accurate enough, the margin of error of the mixing machine is too wide, and no allowance is made for variations in the base paint. Base paint is never completely white and can vary in colour from one production batch to the next. Even from one pallet to the next, or from one tin to another. DIY stores do not adjust their formulae to account for different types of base paint.
The base paint we use for Grey Paint is the whitest and most consistent paint available, and is therefore largely free from variation. Every batch is retested for accuracy.
Deviation from middle grey is measured in Lab*, where L* represents lightness, a* red to green, and b* yellow to blue. Grey Paint deviates by less than 1 point on every value, is imperceptible to the human eye, and performs better in colour tests than the most well-known grey cards.